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Related Experiment Videos

Adipose tissue deposition and cellularity in cimaterol-treated female broilers.

J W Merkley1, A L Cartwright

  • 1U.S. Department of Agriculture, Poultry Research Laboratory, Georgetown, Delaware 19947.

Poultry Science
|June 1, 1989
PubMed
Summary

Feeding female broilers cimaterol, a beta agonist, improved carcass yield and altered adipose tissue development. This dietary supplement reduced abdominal fat pad weight and affected adipocyte size, offering insights into broiler meat production.

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Area of Science:

  • Animal Science
  • Poultry Science
  • Nutritional Biochemistry

Background:

  • Beta agonists are compounds used to modulate growth and carcass characteristics in livestock.
  • Understanding the impact of feed additives like cimaterol on broiler development is crucial for efficient meat production.
  • Adipose tissue development significantly influences carcass yield and meat quality.

Purpose of the Study:

  • To investigate the effects of dietary cimaterol supplementation on carcass yield and composition in female broilers.
  • To analyze the impact of cimaterol on adipose tissue development, including growth and cellularity of various fat depots.
  • To determine the age-related changes in carcass characteristics and adipose tissue in response to cimaterol.

Main Methods:

  • Female broilers were fed a diet containing 0.25 ppm cimaterol from 4 weeks of age.

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  • Birds were sampled at regular intervals (4, 6, 8, 10, 12, and 16 weeks) for analysis.
  • Measurements included eviscerated carcass yield, carcass composition (moisture, protein, lipid), and adipose tissue cellularity (adipocyte size and number).

    • Main Results:

    • Cimaterol significantly increased carcass yield at 10 weeks of age (72.8% vs. 70.0%).
    • Treated birds showed slower decreases in carcass moisture and protein, and slower increases in lipid percentage with age.
    • Abdominal fat pad weight was significantly lower in cimaterol-treated birds at 16 weeks, with adipocyte diameter being more sensitive to treatment than cell number.

    Conclusions:

    • Dietary cimaterol supplementation positively influences carcass yield and modifies adipose tissue development in female broilers.
    • Cimaterol appears to reduce fat deposition by affecting adipocyte size rather than number, particularly in specific depots.
    • Further research into beta agonist effects can optimize broiler production efficiency and meat quality.